发明授权
US5851032A Composite image arrangement 失效
复合图像排列

Composite image arrangement
摘要:
This invention relates to a composite image arrangement, comprising a pattern and a further pattern, substantially parallel to the first pattern, each comprising a plurality of visually contrasting regions, the patterns being in fixed positions relative one to the other on either side of a light transmissive lamina.
公开/授权文献
信息查询
0/0